Replace dielectric nipple with stainless?

Discussion in 'Water Heater Forum, Tanks' started by bbillcee, Oct 18, 2015.

  1. bbillcee

    bbillcee Member

    Joined:
    Feb 25, 2007
    Location:
    New York
    Can I replace a dielectric nipple with a stainless steel one? Will that be ok connected to copper?
     
  2. dj2

    dj2 In the Trades

    Joined:
    Aug 13, 2013
    Location:
    California
    I prefer a brass nipple, or another dielectric nipple.
     
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  4. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    http://www.corrosionist.com/galvanic_corrosion_chart.htm

    The further apart the metals are, the higher their galvanic reactions. A dielectric nipple relies on a plastic insert to isolate different metals. Now, absolutely pure water (doesn't happen in nature), it wouldn't matter much, but the water going through our pipe is not pure, virgin H2O, and thus, has at least some impurities in it, allowing galvanic action and thus corrosion to occur.
     
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    http://www.corrosionist.com/galvanic_corrosion_chart.htm

    The further apart the metals are, the higher their galvanic reactions. A dielectric nipple relies on a plastic insert to isolate different metals. Now, absolutely pure water (doesn't happen in nature), it wouldn't matter much, but the water going through our pipe is not pure, virgin H2O, and thus, has at least some impurities in it, allowing galvanic action and thus corrosion to occur.
     
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